diff --git a/Libraries/src/Amazon.Lambda.AspNetCoreServer/APIGatewayProxyFunction.cs b/Libraries/src/Amazon.Lambda.AspNetCoreServer/APIGatewayProxyFunction.cs
index 357dd72ef..b6c5c7c96 100644
--- a/Libraries/src/Amazon.Lambda.AspNetCoreServer/APIGatewayProxyFunction.cs
+++ b/Libraries/src/Amazon.Lambda.AspNetCoreServer/APIGatewayProxyFunction.cs
@@ -140,6 +140,11 @@ protected override void MarshallRequest(InvokeFeatures features, APIGatewayProxy
                 requestFeatures.Scheme = "https";
                 requestFeatures.Method = apiGatewayRequest.HttpMethod;
 
+                if (string.IsNullOrWhiteSpace(apiGatewayRequest.RequestContext?.DomainName))
+                {
+                    _logger.LogWarning($"Request does not contain domain name information but is derived from {nameof(APIGatewayProxyFunction)}.");
+                }
+
                 string path = null;
                 if (apiGatewayRequest.PathParameters != null && apiGatewayRequest.PathParameters.ContainsKey("proxy") &&
                     !string.IsNullOrEmpty(apiGatewayRequest.Resource))
diff --git a/Libraries/src/Amazon.Lambda.AspNetCoreServer/ApplicationLoadBalancerFunction.cs b/Libraries/src/Amazon.Lambda.AspNetCoreServer/ApplicationLoadBalancerFunction.cs
index 91b4f1ac8..ceccc7b37 100644
--- a/Libraries/src/Amazon.Lambda.AspNetCoreServer/ApplicationLoadBalancerFunction.cs
+++ b/Libraries/src/Amazon.Lambda.AspNetCoreServer/ApplicationLoadBalancerFunction.cs
@@ -52,6 +52,11 @@ protected override void MarshallRequest(InvokeFeatures features, ApplicationLoad
                 throw new Exception("Unable to determine header mode, single or multi value, because both Headers and MultiValueHeaders are null.");
             }
 
+            if (lambdaRequest.RequestContext?.Elb?.TargetGroupArn == null)
+            {
+                _logger.LogWarning($"Request does not contain ELB information but is derived from {nameof(ApplicationLoadBalancerFunction)}.");
+            }
+
             // Look to see if the request is using mutli value headers or not. This is important when
             // marshalling the response to know whether to fill in the the Headers or MultiValueHeaders collection.
             // Since a Lambda function compute environment is only one processing one event at a time it is safe to store